Air cooling island antifreezing flow control system
A flow control, air cooling island technology, applied in heating systems, space heating and ventilation, steam/steam condensers, etc. Simple structure and superior economic benefits
Active Publication Date: 2016-04-20
SHANDONG HONGAO POWER TECHNOLOGY CO LTD +1
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Problems solved by technology
[0008] When the air-cooling unit is retrofitted with high back pressure circulating water heating and energy saving, relying only on traditional protective measures, a large amount of exhaust steam from the low-pressure cylinder of the unit will enter the air-cooling island, which will cause a great waste of energy. However, due to the actual heating load and the heating network cycle Influenced by factors such as water pipelines, power generation load, and the first heating station, the exhaust steam of the low-pressure cylinder of the unit during the heating period cannot be completely recovered by the heating condenser
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[0020] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment includes six rows of parallel air-cooled islands 2 connected to the steam device 1, of which two rows of air-cooled islands 2 are reserved for exhaust steam, and the remaining four rows of air-cooled islands 2 are all closed, and the air-cooled islands 2 are provided with large steam inlet butterfly valves 3, Three kinds of bypasses with different pipe diameters are arranged on the reserved air-cooling islands 2 of the two columns, namely, bypass A4, bypass B5 and bypass C6, and valves 7 are arranged on the above-mentioned bypasses; the pipes of the bypass A4 The diameter of the bypass B5 is Φ219×6mm, the diameter of the bypass B5 is Φ273×5mm, and the diameter of the bypass C6 is Φ457×7mm; the diameter of the steam inlet butterfly valve 3 is DN2600mm.
[0021] According to the design characteristics of the air-cooling unit, after the analysis and calculation of the air-coolin...
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Abstract
The invention relates to the technical field of air cooling island antifreezing, particularly an air cooling island antifreezing flow control system. The air cooling island antifreezing flow control system comprises six columns of parallel air cooling islands connected with a steam device, wherein the two columns of air cooling islands are reserved for discharging steam, and the rest four columns of air cooling islands are sealed. The air cooling island antifreezing flow control system is characterized in that each air cooling island is provided with a steam inlet large butterfly valve; the two reserved columns of air cooling islands are respectively provided with three bypasses with different calibers, namely a bypass A, a bypass B and a bypass C; and each bypass is provided with a valve. The air cooling island antifreezing flow control system is simple in structure, can ensure that the reserved air cooling islands conform to the antifreezing requirement of -30 DEG C, and can maximally utilize the waste heat of the exhaust steam of the set and recover the cold source loss, thereby achieving the goals of lowering the power generation coal consumption of the set and increasing the heat supply capacity; and thus, the air cooling island antifreezing flow control system has very excellent economic benefits.
Description
(1) Technical field [0001] The invention relates to the field of antifreeze technology for air-cooled islands, in particular to an antifreeze flow control system for air-cooled islands. (2) Background technology [0002] When the air-cooled unit operates at an ambient temperature below 0°C in winter, the air-cooled island is prone to freezing failures, especially during the start-up and shutdown stages of the unit and the low-load operation period of the unit. During operation, corresponding measures must be formulated for various harsh operating conditions of the unit in winter to prevent the air-cooled island from freezing. [0003] For air-cooled units operating in pure condensing mode, the following anti-freezing measures are basically used during normal operation in cold winter weather: [0004] (1) The exhaust pressure of the unit should not be lower than 13kPa. During normal operation, the air-cooling fan should be put into automatic control, and pay attention to the...
Claims
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Login to View More IPC IPC(8): F28B9/00F28B11/00F24D19/10
CPCF24D19/1003F28B9/005F28B11/00
Inventor 周国锋丁志波宋艳峰梁建军李锦青周桥刘广梁李兆峰
Owner SHANDONG HONGAO POWER TECHNOLOGY CO LTD